Method string> getStatusJSON

fdbclient/FileBackupAgent.actor.cpp:4931–5053

	}

	ACTOR static Future<std::string> getStatusJSON(FileBackupAgent* backupAgent, Database cx, std::string tagName) {
		state Reference<ReadYourWritesTransaction> tr(new ReadYourWritesTransaction(cx));

		loop {
			try {
				state JsonBuilderObject doc;
				doc.setKey("SchemaVersion", "1.0.0");

				tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
				tr->setOption(FDBTransactionOptions::LOCK_AWARE);

				state KeyBackedTag tag = makeBackupTag(tagName);
				state Optional<UidAndAbortedFlagT> uidAndAbortedFlag;
				state Optional<Value> paused;
				state Version recentReadVersion;

				wait(store(paused, tr->get(backupAgent->taskBucket->getPauseKey())) &&
				     store(uidAndAbortedFlag, tag.get(tr)) && store(recentReadVersion, tr->getReadVersion()));

				doc.setKey("BackupAgentsPaused", paused.present());
				doc.setKey("Tag", tag.tagName);

				if (uidAndAbortedFlag.present()) {
					doc.setKey("UID", uidAndAbortedFlag.get().first.toString());

					state BackupConfig config(uidAndAbortedFlag.get().first);

					state EBackupState backupState =
					    wait(config.stateEnum().getD(tr, Snapshot::False, EBackupState::STATE_NEVERRAN));
					JsonBuilderObject statusDoc;
					statusDoc.setKey("Name", BackupAgentBase::getStateName(backupState));
					statusDoc.setKey("Description", BackupAgentBase::getStateText(backupState));
					statusDoc.setKey("Completed", backupState == EBackupState::STATE_COMPLETED);
					statusDoc.setKey("Running", BackupAgentBase::isRunnable(backupState));
					doc.setKey("Status", statusDoc);

					state Future<Void> done = Void();

					if (backupState != EBackupState::STATE_NEVERRAN) {
						state Reference<IBackupContainer> bc;
						state TimestampedVersion latestRestorable;

						wait(
						    store(latestRestorable, getTimestampedVersion(tr, config.getLatestRestorableVersion(tr))) &&
						    store(bc, config.backupContainer().getOrThrow(tr)));

						doc.setKey("Restorable", latestRestorable.present());

						if (latestRestorable.present()) {
							JsonBuilderObject o = latestRestorable.toJSON();
							if (backupState != EBackupState::STATE_COMPLETED) {
								o.setKey("LagSeconds",
								         (recentReadVersion - latestRestorable.version.get()) /
								             CLIENT_KNOBS->CORE_VERSIONSPERSECOND);
							}
							doc.setKey("LatestRestorablePoint", o);
						}
						doc.setKey("DestinationURL", bc->getURL());